I did not update to the Norton Virus Protection within the timescale. I still have a current contract with BT but my Account page does not have the YOUR SECURITY option in the top menu so I can't get to the Virus Protect option.
How do I upgrade to Norton?
When you log onto the "MyBT" website, on the very first page you need to scroll down to the "Get More From My BT" section and you'll find security in there!